1. The problem statement, all variables and given/known data A 1000kg roller coaster, with its passengers, starts from rest at point A( h= 9.5 m) on a friction track whose profile is shown in the diagram above at right. a) what is its maximum speed? b) with what speed does the roller coaster arrive at point e? c) What constant braking force would have to be applied to the roller coaster at point E, to bring it to rest in a horizontal distance of 5.0 m Given data (from diagram) Point A- 9.5m Point B- 6.5m Point C- 9.2m Point D- 0.50m Point E- 5.5m 2. Relevant equations Ep= mgh 3. The attempt at a solution I used the gravitational potential energy equation to find gravitational potential energy at point A. I don't know if I need to get it for all the points! Also I don't understand where to start in this equation. I also wrote down the givens.